Implement proof of stake consensus mechanism in blockchain
$ python Main.py localhost 10001 5000 keys/genesisPrivateKey.pem
$ python Main.py localhost 10003 5003 keys/stakerPrivateKey.pem
$ python Main.py localhost 10002 5001
$ python Interaction.py
To see the ledger $ localhost:5000/blockchain
$ localhost:5001/blockchain
$ localhost:5003/blockchain